### Home > INT3 > Chapter 10 > Lesson 10.3.1 > Problem 10-145

10-145.

What is the sum of each of the infinite geometric series? If it is not possible to calculate the sum, explain why not. Homework Help ✎

8 + 4 + 2 + …

3 + 9 + 27 + 81 + …

Find the common ratio.

Use the equation for an infinite geometric series:

16

See part (a).

Not possible. *r* > 1, and the terms keep increasing.